JPH0465350U

JPH0465350U -

Info

Publication number: JPH0465350U
Application number: JP10963590U
Authority: JP
Priority date: 1990-10-19
Filing date: 1990-10-19
Publication date: 1992-06-05

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例を示す概念図、第２
図は第１図中の矢印方向から見て示す図、第３
図は第１図の実施例の動作を示すフローチヤート
、第４図は副走査方向の書き出しタイミングを制
御する回路例を示すブロツク図、第５図はレーザ
ー光を用いた画像形成装置の一般的構成を示す概
念図、第６図は第５図中の感光体部分を拡大して
示す図、第７図は転写紙と画像の関係を示す図で
ある。１……光学ユニツト１、２……レーザー発光素
子、３……回転多面鏡、４……ｆθレンズ、５…
…ミラー、６……感光体、７……光学読取り素子
、８……エンコーダー、９……ラツチ回路、１０
……Ｄ／Ａコンバーター、１１……ＣＰＵ、１２
……レジストセンサー、１３……レジストローラ
ークラツチ、２１……帯電ユニツト、２２……感
光体、２３……光学ユニツト、２４……現像ロー
ラ、２５……転写紙、２６……給紙ローラ、２７
……レジストローラ対、２８……転写ユニツト、
２９……定着ローラ対、３０……ミラー、３１…
…グリツプセンサー、Ｌ……レーザー光。 Figure 1 is a conceptual diagram showing one embodiment of the present invention;
The figure is a view shown in the direction of the arrow in Figure 1.
The figure is a flowchart showing the operation of the embodiment shown in Fig. 1, Fig. 4 is a block diagram showing an example of a circuit for controlling the writing start timing in the sub-scanning direction, and Fig. 5 is a general diagram of an image forming apparatus using laser light. FIG. 6 is an enlarged view of the photoreceptor portion in FIG. 5, and FIG. 7 is a diagram showing the relationship between the transfer paper and the image. 1... Optical unit 1, 2... Laser light emitting element, 3... Rotating polygon mirror, 4... fθ lens, 5...
... Mirror, 6 ... Photoreceptor, 7 ... Optical reading element, 8 ... Encoder, 9 ... Latch circuit, 10
...D/A converter, 11 ...CPU, 12
... Registration sensor, 13 ... Registration roller clutch, 21 ... Charging unit, 22 ... Photoreceptor, 23 ... Optical unit, 24 ... Developing roller, 25 ... Transfer paper, 26 ... Paper feed roller, 27
... Registration roller pair, 28 ... Transfer unit,
29... Fixing roller pair, 30... Mirror, 31...
...Grip sensor, L...laser light.

Claims

[Scope of Claim for Utility Model Registration] (1) In an image forming apparatus using a laser beam, an optical reading element is arranged near the photoreceptor within the scanning range of the laser beam, and a paper is detected based on the detection signal of the optical reading element. A registration adjustment device comprising means for controlling the start timing of a feed roller. (2) An image forming apparatus using a laser beam, comprising an optical reading element disposed near the photoreceptor within the scanning range of the laser beam, and means for controlling laser emission timing based on a detection signal of the optical reading element. A registration adjustment device characterized by: